Machine for upsetting bars.



UNITED STATES PATENT OFFICE.

JOHN V. W. REYNDERS AND WILLARD T. SEARS, 0F HARRISBURG, PENNSYLVANIA.

Specication of Letters Patent.

Patented Dec. 25, 1906.

Application filed April 26, 1904. Serial No. 205.030.

To LZZ whom it 11i/ty concern:

Be it known that we, JOHN V. W. REYN- DERs and WILLARD T. SEARS, citizens of the United States, residing in Harrisburg, Pennsylvania, have invented certain Improvements in Machines for Upsetting Bars, of which the following is a specification.

The object of our invention'is to provide a bar-upsetting machine of simpler and less 'expensive construction than those hitherto employed, it being also desired to increase the speed and efficiency of operation of machines of the general class noted by the use of the novel combination of parts described hereinafter. In attaining these objects we employ a relatively stationary die with a device for holding and moving a bar to be upset into said die, together with means for releasing a normally locked portion of the die to permit of the removal of the finished eyebar.

`In the drawings herewith, Figure l is a sectional elevation, to some extent diagrammatic, showing the preferred arrangement of mechanism comprising our invention. Fig. 2 is a plan view of the mechanism shown in Fig. l. Fig. 3 is a plan view, partly in section, of a modified form of bar-clamping mechanism which may be used with our machine. Fig. 4 is a transverse sectional view taken on the line 4 4, Fig. 2, showing certain features of the detail construction of our improved invention; and Fig. 5 is a perspective view of a portion of the clampblock, showing one of the pieces extending therefrom into the die.

In the above drawings, A is the supporting-frame of the machine, which carries upon it a relatively heavy bed-plate B and a pair of steam or hydraulic cylinders C or C. The bed-plate B is provided with a die-recess of the form which it is desired the upset end of the bar shall possess. Immediately over the die-recess is a relatively heavy block B', forming the top of the cavity which is to shape the bar, and there is a wedge D movable between the said block and a top bearing-piece or cap E. This latter has projecting lugs e, through which extend heavy bolts e', securely attached to the main frame of the machine. The wedge D has connected to it a rod d, attached to a piston d@ operac and c in said cylinder for the admission and exhaust of motive fiuid.

The two cylinders C and C are preferably carried on a projecting portion 0. of the main frame A, and the cylinder C, which is in the present case provided with a single admission-port c2, is open at its end farthest from the machine, and it has within it a piston c3. The rod c4, attached to said piston, engages a cross-piece or yoke F, from the ends of which extend tie-bars f, respectively connected to the long arms of levers G. These two levers are respectively pivoted to opposite sides of a sliding block g, through which is a channel open at the top for the reception of a bar H to be operated upon, the short arms of the levers G extending into said channel and forming with the said block a clamping device. This block g of said clamping device is carried by and movable upon the portion o of the main frame of the machine, which may, if desired, have guides a2, and it will be seen that the die-recess of the bed-plate B opens on one side toward said block, so that the bar H may be passed through this latter land enteredin said recess, as indicated in dotted lines. 'In order to support the sides of the bar H and give it the proper shape when it is upset, the block g of the clamping device should extend along both sides of said bar, as at g3, up to practically the widest part of the head thereof, so as vto form a portion of the sides of the die-recess. If desired, sets of rollers g1 may be provided to diminish the friction between the extensions q3 of the block g of the clamping device and the sides of the die-recess of the bed B.

If now fiuid under pressure be admitted through the port c2 of the cylinder C, the piston c3 will be moved outwardly therein, as will also the bars f, at first causing the levers G to be turned on their pivots so that their short arms engage the bar H. Further turning of the levers G being impossible, they, with the block g and the extensions g3, are moved bodily toward the die-recess, with the result that the end of said bar is forced into said die and spread out or upset into the shape indicated in Fig. 2,. said extensions serving to shape a portion of the sides of the bar. During this operation it will be understood that the wedge D is in the positioninditive within the cylinder C', there being ports cated in Fig. 1, so that when the upsetting of IOO ' together theparts of the die andcapable the end-ofthe bar-is completed `fluid may be admitted into the cylinder C through the port c and said wedge moved outwardly to permit of the raising of the block B and the removal of the enlarged end of the bar H.

By the mechanism above described. it will be seen that a bar operated upon is grasped andmoved into the stationary die by means of a clamp consisting of the block g and its attached mechanism, thus reducing to the greatest possible extent the number of clamps and moving parts of the machine.

When it is desired to prepare the machine for a second operation, the wedge D is moved into its original position by means of luid ladmitted into the cylinder- C through the port c, it being noted that the angle oi said `wedge is preferably such that under operating conditions there will be no actualmotion of the wedge when the bar H is 'forced into the die.

While we have illustrated a pair of pivoted levers actuated by a piston moved in a cylinder by Huid under pressure for holding and forcing a bar into the die, it will be understood that we do not limit ourselves to this precise construction, since many other forms of clamp and actuating mechanism thereforl may be substituted without departing from our invention. It desired, there may be substituted for said levers mechanism suchlas that illustrated in Fig. 3. case there are upon a sliding block or plate G avcylinder or cylinders g5, having pistons -gG connectedto wedges 177, placed to act between the bar to be clamped and-the inclined-'faces of abutments g8 on said block. As before, the block would be connected by tie-bars f with the yoke F, upon which acts the piston c3.

We claim as our invention- 1. The combination of a structure provided with a recess having portions of its walls formed'by two pieces independent yof the remainder and respectively on opposite sides of f lsaidrecess, and a'clamp having said pieces iXedto it, with mechanism for causing-said clamp to hrstgrip a bar to be upset and subsequently to move with said bar and the wall Aforming pieces toward said structure, substantially as described.

`2. The -combination ofaclamp, adie having a plurality of parts, a Jframe having portions'surrounding said die, a piece for holding of movementf'hetween said die and the frame in a line substantially parallel to the line of In thisy movement of the clamp for the purpose of retaining in position or releasing said parts of the die, means for actuating the holdingpiece, said piece being of a shape and so placed as to remain immovable independent of its actuating means under operating conditions, and means for moving the clamp with a piece of material carried thereby toward the die, substantially as described.

3. The combination of a frame, a die consisting of a plate having a recess, a block forming a coverl for said recess, a cap connected to the frame, a wedge placed between said cap and the block to retain the latter in position, aA gripping device, and meansfor moving said device to force a piece of material held thereby into the recess of the die, substantially as described.

4. The combination of a frame having a die, a cylinder, a piston having a rod, a crosspiece on the rod, a slideway, a block movable thereon, a pair of' clamping-levers pivoted to the block, and a link for each lever directly connecting one arm thereof with the crosspiece attached to the piston-rod, substantially as described.

5. The combination'of a trame, a die having a plurality of parts, a wedge between said parts of the die and a portion of the frame, a cylinder, a piston therein connected tosaid wedge, a clamp and a second cylinder having a piston connected to said clamp for moving the same toward the die, substantially as described.

6. The combination of a die, a clamp for engaging material to be operated upon, with means for moving the clamp toward the die, said clamp having an extension oreXtensions projecting-into the die, substantially as describedi 4 7. The combination of a die, aslidable block having a portion extending into said die, meansfor clampingapiece of material to said block, with mechanism for moving the block toward saiddie, substantially as de'- scribed.

In testimony whereof-we have signed our names to this speciiication-inthe presence of two subscribingwitnesses.

JOHN V.*W. REYNDERS. WILLARD T. SEARS.

Witnesses:

vWM. C. ARMOR, MARY E. HAUER.

IOO 

